The polymer products are featured by their good performance properties and easiness in making.
To create finished items of a certain configuration of the polymer granules, extrusion equipment is used, and one of its major elements is a screw.
A screw is a metal rod with the screw-like crests directed along its surface.
The purpose of this tool includes mixing and moving the polymer mass to be molded afterwards.
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Troubles of operating the equipment for molding polymers
Unscheduled overheats, temperature drops, high extrusion rates, cleaning with aggressive substances leads to the defects that appear on the screws such as the item’s turns deformation, cracks, and other damages.
Functioning of the worn tool causes uneven agent mixing, interruptions in feeding it.
As a result of direct contact between the metal part and hot viscous material mass, polymers stick onto the screws building carbon deposits.
The maintenance specialists of the molding equipment remarks that, in some cases, it has to stop technological line operation every 2 hours to clean the screws from the stuck substance.
Typical functions of the coatings for screws
In order to improve productivity of the extrusion line, and quality of the created products, special compounds are applied onto the screws that must prevent polymers from sticking to the parts, and to reduce wear of the accessories.
The conventional materials such as lubricating fluids and greases are often used for this purpose. However, they are washed out and evaporate fast, require frequent renewing.
The more efficient solution that more and more number of the extrusion equipment producers prefer is applying the anti-friction solid-film coatings (AFSFCs) from the Russian Modengy company onto the screws.
About the solid lubrication technology and its application on the extrusion line elements
AFSFCs are the modern lubricating materials that form a resistant dry layer on the surfaces to be treated that requires no renewing.
The coatings function effectively at heating up to +350 °С, do not get damaged at short-term unscheduled overheating.
After this products are applied onto the element surfaces, a smooth layer having anti-adhesive and anti-sticking functions is created.
MODENGY 1007 coating is used to protect the screws. It provides stable heat exchange between the part and the polymer material preventing equipment from wearing, and giving no impact on composition of the polymer.
The separating layer of the coating prevents direct contact between the melted substance and the metal elements, and due to that no sticking and carbon deposits building on the equipment is allowed.
Using MODENGY 1007 provides multiple improvement of the extrusion line’s productivity due to eliminating need in cleaning the equipment from the stuck material.
The coating layer is resistant towards washing off even by the chemically aggressive substances. The service lifetime of the coating is equal to the service lifetime of the screw.
This product is applied on both repaired and a brand new parts. Using the coating on the factory-furnished elements enables to improve their operational potential significantly, to minimize probability of failing, and need in restoring them.
The Modengy company provides the service on applying its products at the MODENGY Engineering Center located in Bryansk town.
For more detailed information, and consultation on solving the tasks related to reducing friction and wear contact the Modengy company, please
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